Amarathon runner will donate $5000 to charity if her time is less than or equal to 3 hours. she will donate $2000 if her time is more than 3 hours but less than or equal to 4 hours. finally, she will donate $1000 to charity if her time is more than 4 hours.
a. write a piecewise function describing this situation.

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done

Find the distance between (7,-6) and (-3,-9)

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap